/Engine/Plugins/Enterprise/DatasmithContent/Source/DatasmithContent/Public/DatasmithContentBlueprintLibrary.h
Find all loaded objects of the given type that have a Datasmith User Data that contains the given key and their associated values. This is a slow operation, so editor only.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Editor Scripting | Datasmith User Data", Meta=(DeterminesOutputType="ObjectClass", DynamicOutputParam="OutObjects")) static void GetAllObjectsAndValuesForKey ( [FName](API\Runtime\Core\UObject\FName) Key, [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [UObject](API\Runtime\CoreUObject\UObject\UObject) > ObjectClass, [TArray](API\Runtime\Core\Containers\TArray)< [UObject](API\Runtime\CoreUObject\UObject\UObject) * > & OutObjects, [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > & OutValues )